Adjustable quick-acting pipe wrench



July 6, 1954 J. w. JENSEN 2,682,797

ADJUSTABLE QUICK-ACTING PIPE WRENCH Filed June 17, 1952" IN V EN TOR.

(I V- Jensen Patented July 6, 1954 UNIT ED STAT ES PATENT OFFICEADJUSTABLE QUICK-ACTING PIPE WRENCH Jens W. Jensen, Tonasket, Wash.

I Application June 1'7, 1952, Serial No. 293,979

1- Claim. 1

My invention relates to, improvements in wrenches for use in turningorunscrewing round or cylindrical objects, as gas pipes, cylindricalrods and the like, and the present invention relates more specificallyto an improvement over my Patent No. 2,596,559. The more importantobjects of the present invention are: first to provide a wrench whichmay be readily adjusted to operate perfectly upon different sizes ofpipe; second, to provide a means, whereby the grip of the wrench uponthe object to be handled will be readily made perfect, and still may bereadily released when the movement of the wrench is reversed.

A further object of the present invention is the provision of a wrenchof the character described which is simple in construction, consistingof only a few inexpensive parts which can be assembled easily andquickly, but which is also durable, comparatively light in weight, handyin use, and well adapted for the purpose for which it is intended.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention consists of certain novel'details ofconstruction and combinations of parts hereafter more fully describedand pointed out in the claim, it being understood that changes may bemade in the construction and arrangement of parts without departing fromthe scope of the invention as claimed.

In the accompanying drawing a preferred form of the invention has beenshown.

In said drawing:

Figure 1 is a side view of a preferred embodiment of my invention;

Figure 2 is a bottom plan view of the same; and, Figure 3 is an enlargedfragmentary sectional view on the line 3--3 of Figure 1.

Similar reference characters refer to similar parts throughout theseveral views.

In the drawing the numeral 2 denotes a longitudinal, preferably straighthandle from one side of which extends a lug portion 4, which preferablyis right-angularly disposed to the longitudinal axis of the handle 2.The outer end section of the lug portion 4 preferably is bifurcated anda threaded bore 5 (Figure 1) is extended through the handle 2. Athreaded bolt 6 is screwed into the bore 5, and a pivot pin 8 isextended through the lug portion 4. A ball portion It) is provided atone end. of the bolt 6. One end of a link member I2 extends into thebifurcated end section of the lug portion 4, and the pin 8 is extendedtherethrough.

A bar l4 has a substantially straight main portion and a curved endportion, and the outer end of said main portion is bifurcated. The otherend of the link member I2 is extended into said bifurcated end of thebar I 4 and is pivotally connected thereto by means of a pin it.Intermediate the ends of the main portion of the bar I4 is extendedtherethrough a threaded bore l1, and a threaded bolt [8 is screwed intothe bore l1. Further pivot pins 20 and 22 are crosswise extended throughend portions of the parts 2 and I4, and grooves 24 and 26 are extendedinto those portions of the parts 2' and I4 respectively through whichextend the pins 20 and 22. Flat lug portions 28 and 30 extend fromcurved jaw members 32 and 34 respectively into the grooves 24 and 26 andhave the pins 20 and 22 extended therethrough. The concave sides 36 and38 of the curved jaw members 32 and 34 are provided with any suitableserrations, or are knurled for facilitating the gripping of a pipe 40 orthe like. An internally threaded hollow head portion 42 is provided atone end of the bolt l8, and a socket member 44 is screwed thereinto, sothat the bolts. 6 and 18 are pivotally connected to each other by meansof the member 44 and. the portions l0 and 42. By moving the wrench shownin Figure 1 in a clockwise direction around the axis of the pipe 40 thelatter will be grasped and held firmly by the jaws 32 and 34, while amovement in the opposite direction immediately releases the pipe 40. Thejaws 32 and 34 can be exchanged easily and quickly for jaws of differentdimensions if the wrench is to be used for tubular objects of differentdiameters. Thus one and the same wrench with several pairs of jaws ofdifferent sizes can be used for a large variety of cylindrical orannular objects, the pulling out and replacing of the pins 20 and 22being a simple matter for a mechanic. Moreover, by screwing the bolts 3and it, one of which has a right-hand thread while the other has alefthand thread, more or less into or through the parts 2 and I4, therange of the distance between the jaws 32 and 34 can be altered, so thatthe device can be used for a wide variety of differently dimensionedpipes or the like.

Since certain changes may be made in the above article and difierentembodiments of the invention could be made without departing from thescope thereof, it is intended that all matter contained in the abovedescription or shown in the accompanying drawing shall be interpreted asillustrative and not in a limiting sense.

It is also to be understood that the following claim is intended tocover all of the generic and specific features of the invention hereindescribed.

Having thus fully described my said invention, what I claim as new anddesire to secure by Letters Patent in the United States is:

An adjustable quick acting jaw wrench comprising a longitudinal handlehaving a groove laterally extended into one of its end portions andhaving a lug portion intermediate its ends and right angularly disposedto the longitudinal axis of the handle and laterally extended therefromat that side which has said groove, the extending end of the lug portionbeing bifurcated, and the handle having a threaded cross-bore locatedintermediate said groove and said lug portion, a bar having a curvedportion and a substantially straight portion, an outer end of saidstraight portion being bifurcated and said straight portion havingintermediate its ends a threaded cross-bore while the curved portion ofsaid bar is provided with a groove extended thereinto from its innerside and facing the groove in said handle, a link member whose ends areextended into and pivoted to the bifurcated ends of said bar and saidlug portion of the handle respectively, a first bolt having a sphericalhead portion and a shaft portion screwed into the threaded cross bore insaid handle, a second bolt having a shaft portion screwed into thethreaded cross bore in said bar and having a head portion provided withan internal thread, a socket member, to which the head portion of saidfirst bolt is pivoted, being screwed into the head portion of saidsecond bolt, and a pair of curved jaws each of which has a concave sideprovided with serrations and aconvex side provided with a flat lugportion, the lug portion of one of the jaws being extended into thegroove in the curved portion of said bar and pivoted to said bar, andthe lug portion of the other jaw being extended into the groove in theend portion of said handle and pivoted to said handle.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 1,690,042 Wallis Oct. 30, 1928 2,579,594 Lurie Dec. 25, 195125 2,596,559 Jensen May 13, 1952

